/*
 * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
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package com.oracle.truffle.tools.chromeinspector.types;

import org.json.JSONArray;
import org.json.JSONObject;

import com.oracle.truffle.api.debug.DebugStackTraceElement;
import com.oracle.truffle.api.source.Source;
import com.oracle.truffle.api.source.SourceSection;
import com.oracle.truffle.tools.chromeinspector.ScriptsHandler;
import com.oracle.truffle.tools.chromeinspector.TruffleExecutionContext;

public final class StackTrace {

    private final JSONObject jsonObject;

    public StackTrace(TruffleExecutionContext context, Iterable<DebugStackTraceElement> frames) {
        jsonObject = new JSONObject();
        JSONArray callFrames = new JSONArray();
        for (DebugStackTraceElement frame : frames) {
            SourceSection sourceSection = frame.getSourceSection();
            if (sourceSection == null) {
                continue;
            }
            if (frame.isInternal()) {
                continue;
            }
            Source source = sourceSection.getSource();
            if (source.isInternal()) {
                // should not be, double-check
                continue;
            }
            JSONObject callFrame = new JSONObject();
            callFrame.put("functionName", frame.getName());
            ScriptsHandler sch = context.getScriptsHandler();
            int scriptId = sch.assureLoaded(source);
            callFrame.put("scriptId", Integer.toString(scriptId));
            callFrame.put("url", sch.getScript(scriptId).getUrl());
            callFrame.put("lineNumber", sourceSection.getStartLine() - 1);
            callFrame.put("columnNumber", sourceSection.getStartColumn() - 1);
            callFrames.put(callFrame);
        }
        jsonObject.put("callFrames", callFrames);
    }

    public JSONObject toJSON() {
        return jsonObject;
    }
}
